Hello, Can i connet openMV H7 to beaglebone black hardware ?
Yes you could connect with serial (UART) or USB if the BeagleBone has USB host/OTG.
The BeagleBone has system: debian 7.8 , its compatible with openMV H7 ?
Yes BeagleBone has USB host , I can connect Web Cams, - dev (video0) , but when I connect OpenMV cam, I am not see (video0) device, so maybe, its not compatible
The OpenMV Cam appears as a UART vcp port. Please remember it’s not a webcam. You should see it under /dev/ACM0 or something like that. If you install our udev rules it will appear as /dev/openmvcam.
I find it - but the name is - serial, I try it to connect
serial - not work
But i found "ttyACM0"
do you think, that I should connect OpenMV cam to Serial Debug Port on BeagleBone black with FT232 USB to TTL Serial Converter Adapter Module ?
because there is Error: Cannot query ‘/dev/ttyACM0’: System returned (25): Inappropriate ioctl for device.
Hi, do this to identify the right port:
Unplug the camera.
Plug in the camera.
Whatever new dev device appeared in the camera. As for opening the port… It’s not a video device. You can open the port with a serial program like minicom.
only “serial” and “ttyACM0” are new
if its not a video device, So i cant connect it to Simulink Beaglebone yes ?
It’s the ttyACM0 device. Um, I guess you can connect to simulink. OpenMV IDE should run on the beagle bone too.
A run-time error is encountered when running External mode simulation on hardware. This usually occurs when a hardware resource, such as a web camera or an audio card, is not available or configured incorrectly. The log file, beaglebone_inversion.log, storing model diagnostic information on the hardware has the following content: Error: Cannot query ‘/dev/ttyACM0’: System returned (25): Inappropriate ioctl for device.
do you think that i should try FTDI USB to Serial adapter ?
You can if you like. But, it’s not needed… What program are you trying to open the serial port with?
BeagleBone has serial debug header, I have thought that with this connection The ttyACM0 in Matlab would be worked…
I am using only Matlab and beaglebone,
or SSH connection with Putty- to find out Beaglebone data (dev. names, etc…)
So the Serial Port is needed to open by any program ??
I have no idea how Matlab opens the serial port. I can’t really provide any help in this case.
Um, so, yeah, just attach an ftdi cable to the cameras rx and tx UART pins and put a script on the camera that outputs data to the UART.
I tried to connect to serial from putty, with command ( sudo screen /dev/ttyUSB0 115200. ), I see only a frames of camera.
So should i try to connect RX TX pins of the Openmv Camera to ftdi cable and connect it to USB port of the BeagleBone ? (B image in attachment)
or you think, that I should connect to the Beaglebone “FTDI USB to Serial adapter” , and from adapter connect RX and TX to the OpenMV camera ? (A image in attachment)
and program openMV like this ?
# Image capture and sending via UART to BeagleBone import sensor, image, time from pyb import UART sensor.reset() sensor.set_pixformat(sensor.GRAYSCALE) sensor.set_framesize(sensor.QVGA) sensor.skip_frames(time = 2000) uart = UART(1, 19200) clock = time.clock() while(True): img = sensor.snapshot() uart.write(img) print(clock.fps()) time.sleep(10)
It would be option B. Also, please make sure to specify the the timout_char parameter when making the UART object as you will drop bytes otherwise if the value is too small.
Ok, I will try it,
If I use only the Rx and Tx pins from FTDI cable, should i use only normal USB ? , Or FTDI is required ?
I don’t know what you are trying to do.
I will try B
FTDI cable is required ?
or can be used basic USB with 4 pin (2 pins are Rx Tx)
You need an ftdi cable to turn UART 5v signals to USB.
Ok, thank you for your time. I will try it